Wastewater heat recovery apparatus monitoring system

ABSTRACT

The present invention relates to a wastewater heat recovery apparatus monitoring system including a heat recovery apparatus and a monitoring apparatus. The heat recovery apparatus comprises: a settling filter unit that receives wastewater and settles sediment contained in the wastewater along a settling processing container; a heat-exchanging unit that receives the wastewater from which the sediment has been removed while passing through the settling filter unit, and simultaneously receives cold clean water, to perform heat exchange between the wastewater and the cold clean water to convert the cold clean water into hot clean water; a filtering unit installed between the settling filter unit and the heat-exchanging unit, for performing a first stage filtering of fine foreign substances contained in the wastewater that passes through the settling filter unit and a second stage filtering of fine foreign substances contained in the wastewater that passes through the heat-exchanging unit; and a heat recovery sensing unit that receives an input valve sensed by a connected wastewater pressure sensor, receives cold clean water temperature information sensed by a cold clean water temperature sensor, receives hot clean water temperature information sensed by a hot wastewater temperature sensor, and receives temperature information of a first wastewater sensed by a first wastewater temperature sensor; and receives temperature information of a second wastewater from a second wastewater temperature sensor. The monitoring apparatus is connected to the heat recovery apparatus through an information communication network to control and monitor the operating state of the heat recovery apparatus, to receive the pressure value, cold clean water temperature information, hot clean water temperature information, temperature information of the first wastewater, and temperature information of the second wastewater received from the heat recovery sensing unit, and to display an operating screen, the operating state, an alarm screen, a temperature graph, and a pressure graph of the heat recovery apparatus.

FIELD

The present invention relates to a wastewater heat recovery apparatus monitoring system, and more particularly to a wastewater heat recovery apparatus monitoring system capable of preventing blockage phenomenon by primarily removing sediment contained in the wastewater using a settling filter unit and secondly removing a fine foreign substance contained in the wastewater using a filtering unit, and maximizing a filtering efficiency of the filtering unit by switching circulation directions of the wastewater and clean water in a set period as well as remotely controlling components of the heat recovery apparatus and simultaneously monitoring and controlling entire processes of the heat recovery apparatus.

BACKGROUND

Generally, wastewater heat recovery equipment in which heat of the wastewater is recovered and reused is constructed of a wastewater collection tank in which a hot wastewater is stored a cold clean water tank in which cold clean water is stored, wherein heat is recovered from the hot wastewater and the cold clean water is converted into a hot clean water to be gathered in a hot clean water tank.

That is, the hot wastewater is pumped and pressure transferred to a heat exchanging unit and the cold clean water is pumped and pressure transferred to a heat exchanging unit and the hot wastewater and the cold clean water reversely flow in the heat exchanging unit, whereby heat of the hot wastewater transfers to the cold clean water so that the cold clean water becomes a hot clean water.

At this time, there may be occurred a phenomenon in which a sediment and a fine foreign substance contained in the hot wastewater blockades wastewater paths of the heat exchanger and pipe, the wastewater heat recovery equipment includes a filter for filtering the sediment and fine foreign material.

However, there is a problem in that the filter may be frequently blockaded by the sediment and fine foreign substance contained in the hot wastewater. Accordingly, a means to effectively process a sediment and fine foreign substance contained in the hot wastewater is needed.

However, since an operator cannot identify processes of the wastewater heat recovery apparatus with the naked eye and the operator has to manually remove the blockage occurred in the filter, it is required to construct a system where the operator remotely monitors and controls the entire processes of the wastewater heat recovery apparatus.

SUMMARY

The present invention provides a wastewater heat recovery apparatus monitoring system capable of preventing blockage phenomenon by primarily removing sediment contained in the wastewater using a settling filter unit and secondly removing a fine foreign substance contained in the wastewater using a filtering unit, and maximizing a filtering efficiency of the filtering unit by switching circulation directions of the wastewater and clean water in a set period, thereby monitoring and controlling the entire processes of the wastewater heat recovery apparatus.

According to an aspect of the present invention, there is provided a wastewater heat recovery apparatus monitoring system, including a heat recovery apparatus that includes a settling filter unit that receives wastewater and settles sediment contained in the wastewater using a settling process, a heat exchanging unit that receives the wastewater from which the sediment has been removed while passing through the settling filter unit, and simultaneously receives cold clean water, to perform heat exchange between the wastewater and the cold clean water to convert the cold clean water into hot clean water; a filtering unit installed between the settling filter unit and the heat exchanging unit, for performing a first stage filtering of fine foreign substances contained in the wastewater that passes through the settling filter unit and a second stage filtering of fine foreign substances contained in the wastewater that passes through the heat exchanging unit; and a heat recovery sensing unit that receives a pressure value sensed by a connected wastewater pressure sensor, receives cold clean water temperature information sensed by a cold clean water temperature sensor, receives hot clean water temperature information sensed by a hot wastewater temperature sensor, and receives temperature information of a first wastewater sensed by a first wastewater temperature sensor; and receives temperature information of a second wastewater from a second wastewater temperature sensor; and a monitoring apparatus that is connected to the heat recovery apparatus through an information communication network to control and monitor the operating state of the heat recovery apparatus, receives the pressure value, cold clean water temperature information, hot clean water temperature information, temperature information of the first wastewater, and temperature information of the second wastewater received from the heat recovery sensing unit, and displays an operating screen, the operating state, an alarm screen, a temperature graph, and a pressure graph of the heat recovery apparatus.

EFFECTS

According to the present invention, there is an effect in that a blockage is prevented in advance by primarily removing sediment contained in the wastewater using a settling filter unit and secondly removing foreign substances contained in the wastewater using a filtering unit.

Further, according to the present invention, there is an effect in that filtering efficiency of the filtering unit is maximized by switching circulation directions of wastewater and clean water in a set period.

Further, according to the present invention, there is an effect in that the heat recovery apparatus is remotely managed and controlled in a real time and the heat recovery apparatus is maintained by a few operators, by remotely controlling elements of the heat recovery apparatus and displaying state information of the entire process.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:

FIG. 1 is a construction diagram illustrating a circulation from a first filter to a second filter in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 2 is a construction diagram illustrating a circulation from a second filter to a first filter in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 3 is a construction diagram illustrating a circulation performed by a wastewater backflow module 124 in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 4 is a a construction diagram illustrating a settling filter unit 110 in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 5 is a construction diagram illustrating a heat exchanging unit 120 in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 6 is a construction diagram illustrating a filtering unit 130 in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 7 is a construction diagram illustrating an operation screen display unit 210 in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 8 is a construction diagram illustrating a heat recovery apparatus setting unit 220 in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 9 is a view illustrating an alarm screen display unit 230 in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 10 is a view illustrating a temperature graph generating unit 240 in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 11 is a view illustrating a pressure graph generating unit 250 in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 12 is a view illustrating a data extraction/management unit 260 in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 13 is a view illustrating pressure information in time in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 14 is a view illustrating monthly calorie information in a wastewater heat recovery apparatus monitoring system S according to the present invention.

FIG. 15 is a view illustrating daily temperature information in a wastewater heat recovery apparatus monitoring system S according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Detailed characteristics and advantages of the present invention will be clear with the following detailed description based on the drawings. Prior to this, terms and words used in the specification and claims should be construed that they have meaning and concept conformed with the technical idea of the present invention on the basis of the principle that inventor can properly define concept of the terms in order to describe his invention in the best mode. Further, when it is determined that the detailed description for the known functions and construction related to the present invention makes the gist of the present invention unclear, it should be noted that its detailed description is omitted.

FIG. 1 is a construction diagram illustrating a circulation from a first filter to a second filter in a wastewater heat recovery apparatus monitoring system S according to the present invention, FIG. 2 is a construction diagram illustrating a circulation from a second filter to a first filter in a wastewater heat recovery apparatus monitoring system S according to the present invention and FIG. 3 is a construction diagram illustrating a circulation performed by a wastewater backflow module 124 in a wastewater heat recovery apparatus monitoring system S according to the present invention, wherein the wastewater heat recovery apparatus monitoring system S is constructed including a heat recovery apparatus 100 and a monitoring apparatus 200.

Hereinafter, it is assumed that a data transmission between the heat recovery apparatus 100 and the monitoring apparatus 200 is performed by a data communication network including wired and wireless networks.

First, the heat recovery apparatus 100 is constructed of a settling filter unit 110 that includes a settling filter unit that receives wastewater and settles sediment contained in the wastewater using a settling process; a heat exchanging unit 120 that receives the wastewater from which the sediment has been removed while passing through the settling filter unit 110, and simultaneously receives cold clean water, to perform heat exchange between the wastewater and the cold clean water to convert the cold clean water into hot clean water; a filtering unit 130 installed between the settling filter unit 110 and the heat-exchanging unit 120, for performing a first stage filtering of fine foreign substances contained in the wastewater that passed through the settling filter unit 110 and a second stage filtering of fine foreign substances contained in the wastewater that passed through the heat exchanging unit 120; and a heat recovery sensing unit 140.

In detail, referring to FIGS. 1 to 4, the settling filter unit 110 of the heat recovery apparatus 100 is supplied with the wastewater to perform a settling process, which is constructed of a wastewater settling tank 111, a wastewater supply inlet 112, a wastewater discharge outlet 113, a sediment collection tank 114 and a sediment discharge outlet 115.

The wastewater settling tank 111 is formed in a cone shape whose lower sectional area of a cylinder is smaller than upper sectional area of the cylinder, which has a space formed to receive the wastewater therein.

The wastewater supply inlet 112 is included at an upper one side of the wastewater settling tank 111 and is supplied with the wastewater. The wastewater supplied to the wastewater settling tank 111 from a hot wastewater storage tank 12 is circulated by a whirl generated in the tank 111 and a sediment contained in the wastewater is gathered downward by dead load in the wastewater settling tank 111.

The wastewater discharge outlet 113 extends upward communicating with an top surface of the wastewater settling tank and discharges the wastewater whose sediment has been removed. It discharges the wastewater whose sediment is removed according to a circulation caused by a whirl in the wastewater settling tank 111.

The sediment collection tank 114 is integrally formed in the lower portion of the wastewater settling tank and collects the settled sediment contained in the wastewater. At this time, the sediment collection tank 114 has a structure that it has a sectional area greater than that of the lower portion of the wastewater settling tank 111, and so it is prevented that the sediment is floated as the wastewater forms a whirl.

The sediment discharge outlet 115 communicates with a bottom surface of the sediment collection tank 114 and extends downward, and has a sediment discharge valve 115 a to periodically discharge the sediment gathered in the sediment collection tank 114. When the amount of the sediment gathered in the sediment collection tank 114 is more than a predetermined one, the sediment discharge valve 115 a is opened and the sediment gathered in the sediment collection tank 114 is discharged to the cold wastewater treatment tank 14.

According to the settling filter unit 100 constructed as described above, it is constructed in that the wastewater is supplied into the wastewater settling tank 111 through the wastewater supply inlet 112, the sediment contained in the wastewater supplied is settled, collected in the sediment collection tank 114 and discharged through the sediment discharge outlet 115 and the wastewater whose sediment is removed is discharged through the wastewater discharge output 115.

Referring to FIGS. 1 to 3, the heat exchanging unit 120 of the heat recovery apparatus 100 receives the wastewater that passed through the settling filter unit 110 so as to remove its sediment and cold clean water at the same time so that it changes the cold clean water into hot clean water by performing a heat exchange between the wastewater and the cold clean water. It is constructed of a wastewater supply space 121, a wastewater discharge space 122 and a heat exchange space 123.

The wastewater supply space 121 is provided with the wastewater whose sediment has been removed in the settling filter unit 110 through the wastewater feeding inlet 121 a included to receive the wastewater that passed through the settling filter unit 110.

The wastewater discharge space 122 communicates with the wastewater supply space 121 through a plurality of pipes and discharges the wastewater supplied to the wastewater supply space 121 through the wastewater discharge opening 122 a. That is, it is constructed in that the wastewater gathered in the wastewater supply space 121 is supplied to the wastewater discharge space 122 through a plurality of pipes to be gathered therein.

The heat exchange space 123 is constructed to flow the cold clean water on the surfaces of the plurality of the pipes, including a cold clean water feeding entrance 123 a and a hot clean water discharge opening 123 b. Preferably, the heat exchange space 123 has a space formed to enclose the plurality of pipes at the same time and makes them closed, including the cold clean water feeding entrance 123 a at one side of the closed space and a hot clean water discharge outlet 123 b at the other side of the closed space.

According to the heat exchange unit 120 constructed as described above, it is constructed in that the wastewater input through the wastewater feeding inlet 121 a is gathered in the wastewater discharge space 122 through the plurality of pipes, the gathered wastewater is discharged through the wastewater discharge opening 122 a, and simultaneously the cold clean water is input to the surfaces of the plurality of pipes through the cold clean water feeding inlet 123 a and is discharged to the hot clean water discharge outlet 123 b. At this time, heat of the wastewater flowing through the plurality of pipes is transferred to the cold clean water flowing the surfaces of the plurality of pipes so that the cold clean water increases in temperature and then converts into the hot clean water.

Further, the heat exchange unit 120 is constructed including a wastewater backflow module 124 that is connected to the wastewater feeding entrance 121 a and the wastewater discharge opening 122 a and mounted therebetween in order to make the wastewater fed into the wastewater feeding entrance 121 a and discharged to the wastewater discharge opening 122 a flown in the reverse direction.

The wastewater backflow module 124 serves to remove a foreign substance that is formed in a textile and remained in the heat exchange unit 120. It makes the wastewater flown in the reverse direction in order to remove the foreign substance of a textile form that are simultaneously hung on the plurality of pipes, the pipes connecting the wastewater supply space 121 and the wastewater discharge space 122.

That is, since the foreign substance formed in a textile is hung and remained at an end (wastewater supply space 121 side) of the plurality of the pipes in “U” shape when the wastewater supplied to the wastewater feeding entrance 121 a flows only in a forward direction, from the wastewater supply space 121 to the wastewater discharge space 122, the wastewater is flown in the reverse direction, from the wastewater discharge space 122 to the wastewater supply space 121, so that the foreign substance of a textile form hung in “U” shape can be removed.

At this time, the wastewater backflow module 124 is constructed of a plurality of automatic control valves that is connected on the wastewater feeding entrance 121 a and the wastewater discharge opening 122 b and installed thereon. That is, a ninth valve V9, a tenth valve (V10), an eleventh valve (V11) and a twelfth valve (V12) are constructed on a path of the wastewater feeding entrance 121 a and the wastewater discharge opening 122 b so that the wastewater flowing in the heat exchange unit 120 can be controlled to flow in the forward direction or reverse direction.

For example, when flowing in the forward direction, it is controlled that the ninth valve (V9) is in an open state, the tenth valve (V10) is in a closed state, the eleventh valve (V11) is in a closed state, and the twelfth valve (V12) is in an open state, the wastewater supplied is directed to the wastewater feeding entrance 121 a through the twelfth valve (V12), directed to the wastewater discharge opening 122 a and then discharged through the ninth valve (V9). Further, when flowing in the reverse direction, it is controlled that the ninth valve (V9) is in a closed state, the tenth valve (V10) is in an open state, the eleventh valve (V11) is in an open state, and the twelfth valve (V12) is in a closed state,

the wastewater supplied is directed to the wastewater discharge opening 122 a through the tenth valve (V10), directed to the wastewater feeding entrance 121 a, and then discharged through the eleventh valve (V11).

Meanwhile, it is preferable that when the wastewater flows in the reverse direction, there is included a wastewater discharge valve (V14) to discharge the wastewater flowing through the wastewater discharge opening 121 b, and when the wastewater flows in the forward direction by the wastewater backflow module 124, the filtering unit 130 stops the filtering and at the same time the wastewater discharge valve (V14) is opened.

That is, since the wastewater flowing from the wastewater discharge opening 122 a includes a foreign substance of a textile form, the filtering in the filtering unit 130 is stopped in order that the wastewater is not transferred to the filtering unit 130, and the wastewater discharge valve (V14) is opened so that the wastewater including the foreign substance of a textile form is directly supplied to the cold wastewater process tank 14 and processed.

Referring to FIGS. 1 to 3 and FIG. 6, the filtering unit 130 in the heat recovery apparatus is installed between the settling filter unit 100 and the heat exchange unit 200, and primarily filters fine foreign substance that is included in the wastewater and passed through the settling filter unit 110 and secondly filters the fine foreign substance included in the wastewater that passed through the heat exchange unit 120. The filtering unit 130 is constructed including a first filter 131 and a second filter 132, a first path switching module 133 and a second path switching module 134.

The first and second filters 131 and 132 are installed apart each other in the same structure. And, the wastewater is supplied to or discharged from the first and second filters 131 and 132 through the upper portion and lower portion. A filter panel 131 a and 131 a having a number of square holes is included in the center of the first and second filters 131 and 132, and large amount of steelie 131 b and 131 b is filled in an upper space of the filter panel 131 a and 131 b.

That is, when the wastewater is supplied through the upper portion of the first filter 131, the file foreign substance included in the wastewater is filtered during it passes through the large amount of steelie and then flows downward the filter through the square holes 131 h of the filter channel 131 a. When wastewater is supplied from the lower portion of the first filter 131, as the wastewater flows among the steelie through the square holes 131 h of the filter channel 131 a, the fine foreign substance remaining among the steelie is floated and flows to the upper portion of the filter together with the wastewater.

Additionally, the direction switching of the wastewater in the first and second filters 131 and 132, that is, from the upper portion to the lower portion and from lower portion to the upper portion, can be performed by the first and second path switching module 133 and 134.

The first path switching module 133 alternatively switches the wastewater that passed through the settling filter unit 110 to the first filter 131 or the second filter 132, and the second path switching module 134 alternatively switches the wastewater that passed through the heat exchange unit 120 to the first filter 131 or the second filter 132 and transfers the wastewater to it.

At this time, when the first path switching module 133 transfers the wastewater that passed through the settling filter unit 110 to the first filter 131, the second path switching module 134 transfers the wastewater that passed through the heat exchange unit 120 to the second filter 132, and when the first path switching module 133 transfers the wastewater that passed through the settling filter unit 110 to the second filter 132, the second path switching module 134 transfers the wastewater that passed through the heat exchange unit 120 to the first filter 131.

Meanwhile, a path switching operation of the first and second path switching modules 133 and 134 may be performed in predetermined period or by a sensing of the wastewater pressure sensor PS1 that senses a supply pressure of the wastewater supplied to the settling filter unit 110.

For example, when the first path switching module 133 transfers the wastewater that passed through the settling filter unit 110 to the first filter 131 and the second path switching module 134 transfers the wastewater that passed through the heat exchange unit 120 to the second filter 132, the first path switching module 133 switches the wastewater that passed through the settling filter unit 110 to the second filter 132 in the case that the pressure value sensed by the wastewater pressure sensor PS1 is higher than a reference region, and the second path switching module 134 switches the wastewater that passed through the heat exchange unit 120 to the first filter 131.

Further, when the first path switching module 133 transfers the wastewater that passed through the settling filter unit 110 to the second filter 132, and the second path switching module 134 transfers the wastewater that passed through the heat exchange unit 120 to the first filter 131, in the case that a pressure value sensed by the wastewater pressure sensor PS1 is higher than a reference region, the first path switching module 133 switches the wastewater that passed through the settling filter unit 110 to the first filter 131 and the second path switching module 134 switches the wastewater that passed through the heat exchange unit 120 to the second filter 132.

At this time, the pressure value sensed by the wastewater pressure sensor PS1 can be raised by the fine foreign substance filtered in the first filter 131 and second filter 132 of the filtering unit 130, and for example, the fine foreign substance is accumulated in the first filtering unit 130 more than a predetermined amount, the pressure value sensed in the wastewater pressure sensor PS1 becomes increased.

Meanwhile, when the pressure value sensed by the wastewater pressure sensor PS1 is lower than the reference region, it means an emergency situation such as wastewater leakage, so that an alarm is generated to make an operator known it.

As described above, the wastewater heat recovery device constructed including the settling filter unit 110, the heat exchange unit 120 and the filtering unit 130 may include a cold clean water temperature sensor TS1 for sensing temperature of the cold clean water supplied to the heat exchange unit 120, a hot clean water temperature sensor TS2 for sensing temperature of the hot clean water whose heat was exchanged in the heat exchange unit 120, a first wastewater temperature sensor TS3 for sensing temperature of the wastewater supplied to the heat exchange 120, and a second wastewater temperature sensor TS4 for sensing temperature of the wastewater whose heat was exchanged in the heat exchange unit 120.

Further, the heat recovery sensing unit 140 of the heat recovery apparatus 100 receives a pressure value sensed in the wastewater pressure sensor PS1, cold clean water temperature information sensed in the cold clean water temperature sensor TS1, hot clean water temperature information sensed in the hot clean water temperature sensor TS2, temperature information of the first wastewater sensed in the first wastewater temperature sensor TS3, and temperature information of the second wastewater sensed in the second wastewater temperature sensor TS4.

The transmission module 141 of the heat recovery sensing unit 140 transmits the cold clean water temperature information, the hot clean water temperature information, the temperature information of the first and second wastewater applied from the sensors and the pressure values applied from the wastewater pressure sensor PS1 to the monitoring apparatus 200 through a data communication network and receives control signals for the settling filter unit 110, the heat exchanging unit 120, the filtering unit 130 and the heat recovery sensing unit 140 from the monitoring apparatus 200.

The control module 142 of the heat recovery sensing unit 140 controls the settling filter unit 110, the heat exchanging unit 120, the filtering unit 130 and the heat recovery sensing unit 140 according to the control signals applied from the transmission module 141.

Hereinafter, a monitoring apparatus 200 of a wastewater heat recovery apparatus monitoring system S according to the present invention will be described with referring to FIGS. 7 to 15 as follow.

The monitoring apparatus 200 is connected to the heat recovery apparatus 100 through a data communication network to control and monitor an operation state of the heat recovery apparatus 100 placed in the distance, which includes an operation screen display unit 210, a heat recovery apparatus setting unit 220, an alarm screen display unit 230, a temperature graph generator 240, a pressure graph generator 250, a data extraction/management unit 260, a data management DB 270 and a language conversion unit 280.

First, an operation screen display unit 210 of a monitoring apparatus 200 outputs an operation state of the heat recovery apparatus 100 positioned remotely as illustrated in FIG. 7. It displays cold clean water temperature information, hot clean water temperature information, and temperature information of the first and second wastewater transmitted from a transmission module 141 of the heat recovery apparatus 100 and a pressure value applied from the wastewater pressure sensor PS1. Further, it displays calorie obtained when the cold clean water convers into the hot clean water by comparing the temperature of the cold clean water temperature sensor TS1 with that of the hot clean water temperature sensor TS2 or the temperature of the first wastewater temperature sensor TS3 with that of the second wastewater temperature sensor TS4.

The heat recovery apparatus setting unit 220 of the monitoring apparatus 200 controls to display the pressure value applied from the wastewater pressure sensor PS1, display the pressure value input according to key input signals of an operator and have the pressure value input by the wastewater pressure sensor PS1.

Further, the heat recovery apparatus setting unit 220 sets an operation time of the sediment discharge output 115 in the heat recovery apparatus 100, and transmits the control signal in which the opening and close of the sediment discharge valve 115 a is set to the transmission module 141 in the heat recovery sensing unit 140 of the heat recovery apparatus 100 to control the heat recovery apparatus 100 according to the set time, as illustrated in FIG. 8.

Further, the heat recovery apparatus setting unit 220 sets and controls an operation time of the heat exchanging unit 120 in the heat recovery apparatus 100 according to the set control signal and displays the operation time of the heat exchanging unit 120, which controls a circulation of the wastewater in the forward or reverse direction through the wastewater backflow module 124 according to the set time.

An alarm screen display unit 230 of the monitoring apparatus 200 displays, in case that elements in the settling filter unit 110, the heat exchanging unit 120, the filtering unit 130 and the heat recovery sensing unit 140 of the heat recovery apparatus 100 do not operate the operations set in advance, state and time information of the elements as illustrated I FIG. 9.

The temperature graph generating unit 240 of the monitoring apparatus 200 receives the temperature information sensed by the cold clean water temperature sensor TS1, the hot clean water temperature sensor TS2, the first wastewater temperature sensor TS3 and the second wastewater temperature sensor TS4, of the heat recovery apparatus 100, generates a time series transition curved graph and then displays the graph, as illustrated in FIG. 10.

The pressure graph generating unit 250 of the monitoring apparatus 200 receives pressure information sensed by the wastewater pressure sensor PS1 of the heat recovery apparatus 100 and generates and displays a transition curved graph using the pressure information as illustrated in FIG. 11

The data extraction/management unit 260 of the monitoring apparatus 200 stores and manages in a database DB the pressure information sensed by the wastewater pressure sensor PS1, the calorie information obtained when the cold clean water changes to the hot clean water by comparing temperature values between the hot and cold clean water temperature sensors TS1 and TS2 or the first and second wastewater temperature sensors TS3 and TS4, the temperature information transmitted to the temperature graph generating unit 240 from the transmission module 141, the pressure information transmitted to the pressure graph generating unit 250 from the transmission module 141, and flow-meter information transmitted from the valves V1 to V14 of the heat recovery apparatus 100, as illustrated in FIG. 12.

The data extraction/management unit 260 converts the calorie information, the temperature information, the pressure information and the flow-meter information in the excel file and displays the hourly pressure information, the hourly calorie information, the hourly temperature information, the hourly flow-meter information, the daily pressure information, the daily calorie information, the daily temperature information, the daily flow-meter information, the monthly pressure information, the monthly calorie information, the monthly temperature information, and the monthly flow-meter information.

A language conversion unit 280 of the monitoring apparatus 200 converts the language displayed by the operation screen display unit 210, the heat recovery apparatus setting unit 220, the alarm screen display unit 230, the temperature graph generating unit 240, the pressure graph generating unit 250 and the data extraction/management unit 260 into one of Korean, Chinese and English.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. 

1. A wastewater heat recovery apparatus monitoring system, comprising: a heat recovery apparatus that includes a settling filter unit that receives wastewater and settles sediment contained in the wastewater using a settling process; a heat exchanging unit that receives the wastewater from which the sediment has been removed while passing through the settling filter unit, and simultaneously receives cold clean water, to perform heat exchange between the wastewater and the cold clean water to convert the cold clean water into hot clean water; a filtering unit installed between the settling filter unit and the heat-exchanging unit, for performing a first stage filtering of fine foreign substances contained in the wastewater that passes through the settling filter unit and a second stage filtering of fine foreign substances contained in the wastewater that passes through the heat-exchanging unit; and a heat recovery sensing unit that receives a pressure value sensed by a connected wastewater pressure sensor, receives cold clean water temperature information sensed by a cold clean water temperature sensor, receives hot clean water temperature information sensed by a hot wastewater temperature sensor, and receives temperature information of a first wastewater sensed by a first wastewater temperature sensor; and receives temperature information of a second wastewater from a second wastewater temperature sensor; and a monitoring apparatus that is connected to the heat recovery apparatus through an information communication network to control and monitor the operating state of the heat recovery apparatus, receives the pressure value, cold clean water temperature information, hot clean water temperature information, temperature information of the first wastewater, and temperature information of the second wastewater received from the heat recovery sensing unit, and displays an operating screen, the operating state, an alarm screen, a temperature graph, and a pressure graph of the heat recovery apparatus.
 2. The system according to claim 1, wherein the settling filter unit includes: a wastewater settling tank formed in a cone shape whose lower sectional area is less than upper sectional area; a wastewater supply inlet that is included at an upper one side of the wastewater settling tank and with which the wastewater is supplied; a wastewater discharge outlet that extends upward communicating with an top surface of the wastewater settling tank and discharges the wastewater from which sediment has been removed; a sediment collection tank that is integrally formed in the lower portion of the wastewater settling tank and in which the sediment is settled and gathered; and a sediment discharge outlet that extends downward communicating with the bottom surface of the sediment collection tank and includes a sediment discharge valve to discharge the sediment periodically.
 3. The system according to claim 1, wherein the heat exchanging unit includes: a wastewater supply space that includes a wastewater feeding entrance to be provided with the wastewater that passed through the settling filter unit; a wastewater discharge space that communicates with the wastewater supply space through a plurality of pipes and includes a wastewater discharge opening to discharge the wastewater supplied to the wastewater supply space; and a heat exchange space that includes a cold clean water feeding entrance and a hot clean water discharge opening so that the cold clean water flows on the surfaces of the plurality of the pipes and the cold clean water receives the heat of the wastewater to be a hot clean water.
 4. The system according to claim 3, wherein the heat exchanging unit includes: a wastewater backflow module that is connected to the wastewater feeding entrance and the wastewater discharge opening and mounted therebetween in order to make the wastewater fed to the wastewater feeding entrance and discharged through the wastewater discharge opening flow in the reverse direction, and wherein the system further comprises a wastewater discharge valve to discharge the wastewater flowing from the wastewater discharge opening while the filtering unit stops filtering in case that the wastewater reversely flows by the wastewater backflow module.
 5. The device according to claim 1, wherein the filtering unit includes: first and second filters that are installed apart each other; a first path switching module that alternatively switches any one of the first and second filters and transfers the wastewater that passed through the setting filter unit thereto; and a second path switching module that alternatively switches any one of the first and second filters and transfers the wastewater that passes through the heat exchanging unit thereto, and wherein in case that the first path switching module transfers the wastewater that passed through the settling filter unit to the first filter, the second path switching module transfers the wastewater that passes through the heat exchanging unit to the second filter, and in case that the first path switching module transfers the wastewater that passed through the settling filter unit to the second filter, the second path switching module transfers the wastewater that passed through the heat exchanging unit to the first filter.
 6. The device according to claim 5, further including a wastewater pressure sensor for sensing a supply pressure of the wastewater supplied to the settling filter unit, wherein in case that a pressure value sensed in the wastewater pressure sensor is higher than a reference region, the first path switching module switches to transfer the wastewater that passed through the settling filter unit to the second filter, and the second path switching module switches to transfer the wastewater that passed through the heat exchanging unit to the first filter, and in the case that a pressure value sensed in the wastewater pressure sensor is not higher than a reference region, the second path switching module transfers the wastewater that passed through the settling filter unit to the first filter, the second path switching module transfers the wastewater that passes through the heat exchanging unit to the second filter.
 7. The system according to claim 6, wherein an alarm is generated in case that the pressure value sensed in the wastewater pressure sensor is lower than a reference region.
 8. The system according to claim 1, further comprising: a cold clean water temperature sensor for sensing temperature of the cold clean water supplied to the heat exchanging unit; a hot clean water temperature sensor for sensing temperature of the hot clean water whose heat was exchanged in the heat exchanging unit; a first wastewater temperature sensor for sensing temperature of the wastewater supplied to the heat exchanging unit; and a second wastewater temperature sensor for sensing temperature of the wastewater whose heat was exchanged in the heat temperature.
 9. The system according to claim 1, wherein the heat recovery sensing unit includes: a transmission module for transmitting pressure value, cold clean water temperature information, hot clean water temperature information, temperature information of the first wastewater, and temperature information of the second wastewater that are received from the wastewater pressure sensor, the cold clean water temperature sensor, the hot clean water temperature sensor, and the temperature sensors of the first and second wastewater, to a monitoring unit through the communication network, and receiving control signals for the settling filter unit, the heat exchanging unit, the filtering unit and the heat recovery sensing unit from the monitoring apparatus; and a control module for controlling the settling filter unit, the heat exchanging unit, the filtering unit and the heat recovery sensing unit according to the control signals received from the transmission module.
 10. The system according to claim 1, wherein the monitoring apparatus includes: an operation screen display unit for displaying an operation screen, an operation state, an alarm screen, a temperature graph and a pressure graph of the heat recovery apparatus, and additionally displaying cold clean water temperature information, hot clean water temperature information and first and second wastewater temperature information transmitted from the heat recovery apparatus and a pressure value transmitted from the wastewater pressure sensor, and calorie obtained when the cold clean water changes to the hot clean water by comparing temperature values between the hot and cold clean water temperature sensors or the first and second wastewater temperature sensors; and a heat recovery apparatus setting unit for displaying a pressure value applied from the wastewater pressure sensor and a pressure value input according to a key input signal of a user, controlling the wastewater pressure sensor to have an input value, and controlling the heat recovery apparatus by setting a sediment discharge outlet operating time in the heat recovery apparatus and transmitting the set control signal to the transmission module in the heat recovery sensing unit of the heat recovery apparatus to control the heat recovery apparatus.
 11. The system according to claim 10, wherein the heat recovery apparatus setting unit sets and controls an operation time of the heat exchanging unit in the heat recovery apparatus according to the set control signal and displays the operation time of the heat recovery unit, so as to circulate the wastewater in the forward or reverse direction in the set time.
 12. The system according to claim 1, wherein the monitoring apparatus includes: an alarm screen display unit for displaying, in case that elements in the settling filter unit, the heat exchanging unit, the filtering unit and the heat recovery sensing unit of the heat recovery apparatus do not operate the operations set in advance, state and time information of the elements; a temperature graph generating unit for receiving temperature information sensed by the cold clean water temperature sensor, the hot clean water temperature sensor, the first wastewater temperature sensor and the second wastewater temperature sensor of the heat recovery apparatus, generating a time series transition curved graph and displaying the time series transition curved graph; and a pressure graph generating unit for receiving pressure information sensed by the wastewater pressure sensor of the heat recovery apparatus and generating and displaying a transition curved graph using the pressure information.
 13. The system according to claim 1 or 12, wherein the monitoring apparatus Includes a data extraction/management unit for storing and managing in a database DB the pressure information sensed by the wastewater pressure sensor of the heat recovery apparatus, the calorie information obtained when the cold clean water changes to the hot clean water by comparing temperature values between the hot and cold clean water temperature sensors or the first and second wastewater temperature sensors, the temperature information transmitted to the temperature graph generating unit from the heat recovery apparatus, the pressure information transmitted to the pressure graph generating unit from the heat recovery apparatus, and flow-meter information transmitted from the valves of the heat recovery apparatus.
 14. The system according to claim 1, wherein the monitoring apparatus includes a language converter for converting the language of the operation screen, the operation state, the alarm screen, the temperature graph and the pressure graph of the heat recovery apparatus into one of Korean, Chinese and English and displaying the converted language. 